inflexive

Inflexive is a term used in linguistics to describe verbs that do not inflect for person or number in their conjugation. This means that the form of the verb remains the same regardless of who is performing the action or how many are performing it. Inflexive verbs are common in certain languages and grammatical structures, particularly in certain types of non-finite verb forms, such as infinitives, gerunds, and participles.

In contrast to inflective verbs, which change their form to indicate the subject of the sentence (e.g., "I run," "you run," "he runs"), inflective verbs maintain a single form. For example, in English, the infinitive form of a verb is always "to" plus the base form of the verb (e.g., "to run," "to eat," "to sleep"). This lack of inflection can make inflective verbs more straightforward to learn and use, as there are fewer forms to memorize.

Inflective verbs are often found in languages with simpler grammatical systems or in specific verb forms that are used in a consistent manner across different subjects. They can also be found in languages that have undergone grammaticalization processes, where certain verb forms have lost their original inflectional meaning and become fixed in a single form.

Examples of inflective verbs in English include the base form of the verb (e.g., "run," "eat," "sleep"), as well as certain non-finite forms like the gerund (e.g., "running," "eating," "sleeping") and the present participle (e.g., "running," "eating," "sleeping"). In other languages, such as Chinese, most verbs are inflective, as they do not change form based on the subject.